The concepts of strong PS-irresolute open mapping and strong PS-irresolute closedmapping are introduced in L-spaces and their properties are researched.
给出了强ps -不定开映射和强ps -不定闭映射的概念，并且讨论了它们的一些性质。
2
Deepen the open mapping theorem, define the closedmapping and the weakly closedmapping under untithesis, and also discuss some of their related properties.
深化算子的开映射定理，对偶地定义了算子的闭映射与弱闭映射，并讨论了相关的若干性质。
3
The axial shear modulus has been derived in closed form by using the conformal mapping approach integrated with the Laurent expansion.